[ad_pod ]Tottenham fans have taken to Twitter to react after Son Heung-Min put in a terrific performance against Borussia Dortmund, as Spurs took one step into the Champions League quarter-finals with a 3-0 win over the Bundesliga leaders.The South Korean international, who has truly stepped up in the absence of Harry Kane and Dele Alli, scored a terrific volley against Lucian Favre's side to open the scoring - his ninth goal against them means he has netted against Dortmund more than any other club throughout his career.Son's strike was his 11th goal from the last 16 games, and he has truly emerged from the shadows to become one of Spurs' most important players.Most of the north London-based club's supporters probably feared the worst when Kane and Alli suffered their respective injuries, but the former Bayer Leverkusen forward is helping them forget all about the English duo.Let's see how the Spurs supporters reacted on Twitter...